Light Year Distance Calculator

Calculate the distance light can travel in a given amount of time with this online calculator.

Time: in years

Fill in the amount of time to determine how many miles light has travelled.

What is a lightyear?

A light year is a measurement of distance. This distance is measured by how far light can travel in a year.

Light travels at approximately 186,000 miles per second.

In one year (365.25 days) that is equivalent to 5,869,713,600,000 miles.

Example: How far does light travel in 3 months.

3 months is 1/4 year. So enter .25 in the calculator to determine the distance that light travels in 3 months.

Answer: 1,467,428,400,000 miles

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